001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.shiro.authz.annotation; 020 021import java.lang.annotation.Documented; 022import java.lang.annotation.ElementType; 023import java.lang.annotation.Retention; 024import java.lang.annotation.RetentionPolicy; 025import java.lang.annotation.Target; 026 027/** 028 * Requires the current Subject to be a "guest", that is, they are not authenticated <em>or</em> remembered 029 * from a previous session for the annotated class/instance/method to be accessed or invoked. 030 * <p/> 031 * This annotation is the logical inverse of the {@link RequiresUser RequiresUser} annotation. That is, 032 * <code>RequiresUser == !RequiresGuest</code>, or more accurately, 033 * <p/> 034 * <code>RequiresGuest === subject.{@link org.apache.shiro.subject.Subject#getPrincipal() getPrincipal()} == null</code>. 035 * 036 * @see RequiresAuthentication 037 * @see RequiresUser 038 * 039 * @since 0.9.0 040 */ 041@Target({ElementType.TYPE, ElementType.METHOD}) 042@Retention(RetentionPolicy.RUNTIME) 043@Documented 044public @interface RequiresGuest { 045}